The character value of the key. If the key corresponds to a printable character, this value is a non-empty Unicode string containing that character. If the key doesn't have a printable representation, this is an empty string. See key names and char values for the detail.

Note: If the key is used as a macro that inserts multiple characters, this attribute's value is the entire string, not just the first character.

key只读

DOMString (string)

The key value of the key represented by the event. If the value has a printed representation, this attribute's value is the same as the char attribute. Otherwise, it's one of the key value strings specified in Key values. If the key can't be identified, this is the string "Unidentified". See key names and char values for the detail. Read Only.

charCode只读

Unsigned long (int)

The Unicode reference number of the key; this attribute is used only by the keypress event. For keys whose char attribute contains multiple characters, this is the Unicode value of the first character in that attribute.

Warning: This attribute is deprecated; you should use char instead, if available.

keyCode只读

Unsigned long (int)

A system and implementation dependent numerical code identifying the unmodified value of the pressed key. This is usually the decimal ASCII (RFC 20) or Windows 1252 code corresponding to the key; see Virtual key codes for a list of common values. If the key can't be identified, this value is 0.

Warning: This attribute is deprecated; you should use key instead, if available.

which只读

Unsigned long (int)

A system and implementation dependent numeric code identifying the unmodified value of the pressed key; this is usually the same as keyCode.

Warning: This attribute is deprecated; you should use key instead, if available.

location只读

long (float)

The location of the key on the device.

repeat只读

boolean

true if a key has been depressed long enough to trigger key repetition, otherwise false.

locale只读

string

The language code for the key event, if available; otherwise, the empty string.

ctrlKey只读

boolean

true if the control key was down when the event was fired. false otherwise.

shiftKey只读

boolean

true if the shift key was down when the event was fired. false otherwise.

altKey只读

boolean

true if the alt key was down when the event was fired. false otherwise.

metaKey只读

boolean

true if the meta key was down when the event was fired. false otherwise.